My wife and I are doing the Vision on Oct. 19. We have done the Riviera on Carnival twice (both times in late Sept), all I can say is hot-hot-hot. We did the Sea of Cortez twice on Hal. I don't remember the first date but it was their first sailing in this region, our second was right after a hurricane (missed Cabo because of the damage) but the weather was great. So far we have loved this whole idea of cruising Mexico. Incidently, the Vision of the Seas is beautiful, been on her twice so far. Seems a lot classier then Carnival. The decor is more subdued and and laid back instead of in your face Vegas Glitzy.Whenever and whoever you go with, your going to have a great time.